#!/bin/sh

# $Id: makedefs 519 2005-01-03 19:19:41Z asmodai $
# 
# Copyright (c) 2002, 2003, 2004 The TenDRA Project <http://www.tendra.org/>
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

# This script is inspired by Postfix' makedefs script.
# The purpose of this script is to determine the host on which we are
# compiling TenDRA and provide sane compilation defaults.

# Makefile.def revision number, used for determining if we need to rerun.
MKDEFVER=1

HOSTARCH=`/usr/bin/env uname -m`
SYSTEM=`/usr/bin/env uname -s`
VERSION=`/usr/bin/env uname -r`

. ./makedefs.funcs

if [ "${1}" = "-h" ]; then
	usage
	exit
fi

if [ -f Makefile.defs ]; then
	echo "NOTICE: old Makefile.defs file found, overwriting..."
	echo
fi

echo "${SYSTEM}.${VERSION} detected..."
echo

# See the URL in the warning below for why this is bad.
if [ ! -z ${LD_LIBRARY_PATH} ]; then
	echo "WARNING: LD_LIBRARY_PATH set, please don't do that (see:"
	echo "http://www.visi.com/~barr/ldpath.html)"
	echo "Setting to empty environment variable..."
	echo
	LD_LIBRARY_PATH=""
fi

# Set up defaults
EXECFORMAT=elf		# ELF is the de facto executable file format nowadays.

case "${SYSTEM}.${VERSION}" in
	DragonFly.1*)	# Use the system supplied GCC for CC.
			# System definition is __DragonFly__
			check_cc
			LD="ld"
			LDOPTS=
			LDCRT="/usr/lib/crt1.o"
			LIBS="-L/usr/lib -lc"
			OSFAM="dragonfly"
			OSVER="DRAGONFLY1"
			;;
	FreeBSD.4*)	# Use the system supplied GCC for CC.
			# System definition is __FreeBSD__
			check_cc
			LD="ld"
			LDOPTS=
			LDCRT="/usr/lib/crt1.o"
			LIBS="-L/usr/lib -lc"
			OSFAM="freebsd"
			OSVER="FREEBSD4"
			;;
	FreeBSD.5*)	# Use the system supplied GCC for CC.
			# System definition is __FreeBSD__
			check_cc
			LD="ld"
			LDOPTS=
			LDCRT="/usr/lib/crt1.o"
			LIBS="-L/usr/lib -lc"
			OSFAM="freebsd"
			OSVER="FREEBSD5"
			;;
	Linux.2.4*)	# Use the system supplied GCC for CC.
			# System definition is __linux
			check_cc
			LD="ld"
			LDOPTS="--dynamic-linker /lib/ld-linux.so.2"
			LDCRT="/usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtn.o"
			LIBS="-L/usr/lib -lc"
			OSFAM="linux"
			OSVER="LINUX24"
			;;
	Linux.2.6*)	# Use the system supplied GCC for CC.
			# System definition is __linux
			check_cc
			LD="ld"
			LDOPTS="--dynamic-linker /lib/ld-linux.so.2"
			LDCRT="/usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtn.o"
			LIBS="-L/usr/lib -lc"
			OSFAM="linux"
			OSVER="LINUX26"
			;;
	Minix.2*)	# Use the system supplied cc for CC.
			# It aims to be C90 conforming.
			check_cc
			LD=""
			LDOPTS=
			LDCRT=""
			# Minix only runs on x86 for now.
			LIBS="-L/usr/lib/i386 -lc"
			OSFAM="minix"
			OSVER="MINIX2"
			;;
	NetBSD.1*)	#
			check_cc
			LD="ld"
			LDOPTS=
			LDCRT="/usr/lib/crt0.o"
			LIBS="-L/usr/lib -lc"
			OSFAM="netbsd"
			OSVER="NETBSD1"
			;;
	NetBSD.2*)	#
			check_cc
			LD="ld"
			LDOPTS="--dynamic-linker /libexec/ld.elf_so"
			LDCRT="/usr/lib/crt0.o /usr/lib/crti.o /usr/lib/crtn.o"
			LIBS="-L/usr/lib -lc"
			OSFAM="netbsd"
			OSVER="NETBSD2"
			;;
	OpenBSD.3*)	#
			check_cc
			LD="ld"
			LDOPTS=
			LDCRT="/usr/lib/crt0.o"
			LIBS="-L/usr/lib -lc"
			OSFAM="openbsd"
			OSVER="OPENBSD3"
			;;
	SunOS.5*)	# Do not use the cc in /usr/ucb since it is an optional
			# software package.
			if [ "x${CC}" = "x" ]; then
			    CC=`/usr/bin/env cc`
			    case "${CC}" in
				*ucb*cc*)
				    echo "Please set your PATH or CC environment variable to a working compiler and not"
				    echo "the ucb/cc one"
				    exit 1
				    ;;
			    esac;
			fi
			CC=${CC}
			LD="ld"
			LDOPTS=
			LDCRT=
			LIBS="-L/usr/lib -lc"
			OSFAM="sunos"
			OSVER="SUNOS5"
			;;
	*)		# Make sure we specify what we want to hear from the
			# people submitting feedback.
			echo "Unknown \"${SYSTEM}\" and \"${VERSION}\" combination"
			echo "Please report the following to the developers:"
			echo
			echo "uname -r:	${VERSION}"
			echo "uname -s:	${SYSTEM}"
			echo
			;;
esac

check_hostarch

if [ -z "${PREFIX}" ]; then
	PREFIX=/usr/local;
fi

echo "Setting Makefile.defs environment to the following:"
echo
echo "PREFIX:		${PREFIX}"
echo "CC:		${CC}"
echo "LD:		${LD}"
echo "LDOPTS:		${LDOPTS}"
echo "LDCRT:		${LDCRT}"
echo "LIBS:		${LIBS}"
echo "OSFAM:		${OSFAM}"
echo "OSVER:		${OSVER}"
echo "BLDARCH:	${BLDARCH} (${HOSTARCH})"
echo "BLDARCHBITS:	${BLDARCHBITS} bit"
echo "EXECFORMAT:	${EXECFORMAT}"

cat > Makefile.defs <<EOF
MKDEFVER=${MKDEFVER}
PREFIX=${PREFIX}
CC?=${CC}
LD?=${LD}
LDOPTS=${LDOPTS}
LDCRT=${LDCRT}
LIBS=${LIBS}
OSFAM=${OSFAM}
OSVER=${OSVER}
LD_LIBRARY_PATH=${LD_LIBRARY_PATH}
BLDARCH=${BLDARCH}
BLDARCHBITS=${BLDARCHBITS}
EXECFORMAT=${EXECFORMAT}
EOF
